package com.mzpai.product.util;
import java.awt.BasicStroke;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.Shape;
import java.awt.geom.RoundRectangle2D;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.OutputStream;
import java.net.URL;
import java.util.Hashtable;
import java.util.Random;

import javax.imageio.ImageIO;

import com.google.zxing.BarcodeFormat;
import com.google.zxing.BinaryBitmap;
import com.google.zxing.DecodeHintType;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatReader;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.Result;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.common.HybridBinarizer;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import com.google.zxing.client.j2se.BufferedImageLuminanceSource;
public class QRCodeUtil {

	private static final String CHARSET = "utf-8";
    private static final String FORMAT_NAME = "JPG";
    private static final int QRCODE_SIZE = 300; // 二维码尺寸，宽度和高度均是300
    private static final int WIDTH = 80;  //LOGO宽度
    private static final int HEIGHT = 80; //LOGO高度
    /**
     * 生成二维码的方法
     * @param content 目标url
     * @param imgPath logo图片地址
     * @param needCompress 是否压缩logo
     * @return 二维码图片
     * @throws Exception
     */
    private static BufferedImage createImage(String content, String url,boolean needCompress) throws Exception {
		Hashtable hints = new Hashtable();
		hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);//指定二维码的纠错等级为高级
		hints.put(EncodeHintType.CHARACTER_SET, CHARSET);//指定字符编码为“utf-8”
		hints.put(EncodeHintType.MARGIN, 1); //设置图片的边距
		//参数1：内容，目标url,参数2：固定写法，参数3：二维码的宽度，参数4：二维码的高度，参数5：二维码属性设置
		BitMatrix bitMatrix = new MultiFormatWriter().encode(content,BarcodeFormat.QR_CODE, QRCODE_SIZE, QRCODE_SIZE, hints);
		int width = bitMatrix.getWidth();//二维码的宽度
		int height = bitMatrix.getHeight();//二维码的高度
		BufferedImage image = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);//生成的二维码image  .TYPE_4BYTE_ABGR
		for (int x = 0; x < width; x++) {
			for (int y = 0; y < height; y++) {
				image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000: 0xFFFFFFFF);
			}
		}
		// 插入logo图片  参数1：二维码图片，参数2：logo图片地址，参数3：压缩图片
		QRCodeUtil.insertImage(image, url, needCompress);
		return image;
	}
    
    /**
     * 插入logo图片
     * @param source 二维码图片
     * @param imgPath LOGO图片地址
     * @param needCompress 是否压缩
     * @throws Exception
     */
    private static void insertImage(BufferedImage source, String url,boolean needCompress) throws Exception {
          
    	  URL urlObj = new URL(url);
          Image src = ImageIO.read(urlObj);
          int width = src.getWidth(null);
          int height = src.getHeight(null);
          if (needCompress) { // 压缩LOGO
              if (width > WIDTH) { //如果上传logo宽 >60
                  width = WIDTH;
              }
              if (height > HEIGHT) { //如果上传logo高>60
                  height = HEIGHT;
              }
              Image image = src.getScaledInstance(width, height,Image.SCALE_SMOOTH);
              BufferedImage tag = new BufferedImage(width, height,BufferedImage.TYPE_INT_RGB);
              
              Graphics g = tag.getGraphics();
              g.drawImage(image, 0, 0, null); // 绘制缩小后的图
              g.dispose();
              src = image;
          }
          // 插入LOGO
          Graphics2D graph = source.createGraphics();
          int x = (QRCODE_SIZE - width) / 2;
          int y = (QRCODE_SIZE - height) / 2;
          graph.drawImage(src, x, y, width, height, null);
          Shape shape = new RoundRectangle2D.Float(x, y, width, width, 6, 6);
          graph.setStroke(new BasicStroke(3f));
          graph.draw(shape);
          graph.dispose();
    }
    
    /**
     * 生成二维码(内嵌LOGO)
     * @param content  内容
     * @param imgPath  logo地址
     * @param destPath 存放目录
     * @param needCompress 是否压缩logo
     * @throws Exception 
     */
    public static void encode(String content, String imgPath, String destPath, boolean needCompress) throws Exception {
		BufferedImage image = QRCodeUtil.createImage(content, imgPath,needCompress); //生成二维码
		mkdirs(destPath);
		String file = new Random().nextInt(99999) + ".jpg";
		ImageIO.write(image, FORMAT_NAME, new File(destPath + "/" + file));
    }
    
    
    /**
     * 生成二维码(内嵌LOGO)
     * @param content  内容
     * @param imgPath  logo地址
     * @param destPath 存放目录
     * @param needCompress 是否压缩logo
     * @throws Exception 
     */
    public static BufferedImage encodenew(String content, String url, boolean needCompress) throws Exception {
		BufferedImage image = QRCodeUtil.createImage(content, url,needCompress); //生成二维码
		return image;
    }
    
    
    /**
     * 当文件夹不存在时，mkdirs会自动创建多层目录，区别于mkdir．(mkdir如果父目录不存在则会抛出异常)
     * @param destPath 存放目录
     */
    public static void mkdirs(String destPath) {
        File file = new File(destPath);
        if (!file.exists() && !file.isDirectory()) {
            file.mkdirs();
        }
    }
    /**
     * 生成二维码(内嵌LOGO),没有压缩
     *
     * @param content  内容
     * @param imgPath  LOGO地址
     * @param destPath 存储地址
     * @throws Exception
     */
    public static void encode(String content, String imgPath, String destPath)throws Exception {
        QRCodeUtil.encode(content, imgPath, destPath, false);
    }
    
    /**
     * 生成二维码，无内嵌logo
     *
     * @param content      内容
     * @param destPath     存储地址
     * @param needCompress 是否压缩LOGO
     * @throws Exception
     */
    public static void encode(String content, String destPath,boolean needCompress) throws Exception {
        QRCodeUtil.encode(content, null, destPath, needCompress);
    }
    /**
     * 生成二维码
     *
     * @param content  内容
     * @param destPath 存储地址
     * @throws Exception
     */
    public static void encode(String content, String destPath) throws Exception {
        QRCodeUtil.encode(content, null, destPath, false);
    }
    
    /**
     * 生成二维码(内嵌LOGO)
     *
     * @param content      内容
     * @param imgPath      LOGO地址
     * @param output       输出流
     * @param needCompress 是否压缩LOGO
     * @throws Exception
     */
    public static void encode(String content, String imgPath,OutputStream output, boolean needCompress) throws Exception {
        BufferedImage image = QRCodeUtil.createImage(content, imgPath,needCompress);
        ImageIO.write(image, FORMAT_NAME, output);
    }
    /**
     * 生成二维码
     *
     * @param content 内容
     * @param output  输出流
     * @throws Exception
     */
    public static void encode(String content, OutputStream output)throws Exception {
        QRCodeUtil.encode(content, null, output, false);
    }
    
    /**
     * 解析二维码
     * 按文件参数解析
     * @param file 二维码图片
     * @return
     * @throws Exception
     */
    public static String decode(File file) throws Exception {
        BufferedImage image;
        image = ImageIO.read(file);
        if (image == null) {
            return null;
        }
        BufferedImageLuminanceSource source = new BufferedImageLuminanceSource(image);
        BinaryBitmap bitmap = new BinaryBitmap(new HybridBinarizer(source));
        Result result;
        Hashtable hints = new Hashtable();
        hints.put(DecodeHintType.CHARACTER_SET, CHARSET);//指定字符编码为“utf-8”
        result = new MultiFormatReader().decode(bitmap, hints);
        String resultStr = result.getText();//二维码文本内容
        return resultStr;
    }

    /**
     * 解析二维码
     * 按二维码图片地址解析
     * @param path 二维码图片地址
     * @return  不是二维码的内容返回null,是二维码直接返回识别的结果
     * @throws Exception
     */
    public static String decode(String path) throws Exception {
        /**
         * http://www.test.com/page/weizhi.html?devicesName=消防栓_WRbb&devicesNumber=2018092512094659f6aee7&hydrantId=d88219b0-c07e-11e8-87a3-2302a122c883
         * &equipment=触发器01,撞到触发器;触发器02,开盖触发器;触发器03,漏水触发器;
         */
        return QRCodeUtil.decode(new File(path));
    }
}
